pkg upgrade is broken

[eladts]

Problem description
When running the pkg upgrade command Termux get a 403 error from dl.bintray.com and the command fails with the following error message:

Ign:1 https://dl.bintray.com/termux/termux-packages-24 stable InRelease
Err:2 https://dl.bintray.com/termux/termux-packages-24 stable Release
  403  Forbidden
Reading package lists... Done
E: The repository 'https://dl.bintray.com/termux/termux-packages-24 stable Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

Steps to reproduce
run the pkg upgrade command.

Expected behavior
Termux gets an updated list of packages and gives the option to upgrade.

Additional information

Updatable packages:
All packages up to date
Subscribed repositories:
https://dl.bintray.com/termux/termux-packages-24 stable/main
System information:
Linux localhost 4.4.153-perf-gf156a67 #1 SMP PREEMPT Mon Jul 22 06:37:09 CDT 2019 aarch64 Android
Termux-packages arch:
aarch64
Android version:
9
Device manufacturer:
motorola
Device model:
moto x4

[ghost]

Please, check termux/termux-packages#4358.